Spatial Differentiation of Total Nitrogen Content and the Activity of n-transforming Enzymes in a Soil

• Autorzy: Piotrowska-Długosz A. , Rybacki M. , Długosz J. , Kobierski M. , Wilczewski E.

Warianty tytułu

PL

Zróżnicowanie przestrzenne zawartości azotu ogółem oraz aktywności enzymów przemian azotu w glebie

• Języki publikacji: EN

Abstrakty

EN

The objective of this study was to evaluate and compare the spatial differentiation of total N (NTOT) content and urease (UR), nitrate reductase (NR) and arginine deaminase (ADA) activities in the surface horizon of Luvisol and Phaeozem of the Pomerania and Cuiavia region. 50 soil samples from both study areas were collected in April 2007 in a square sampling grid (90 × 40 m). The results were evaluated with the use of geostatistical methods. Spatial variability of the investigated parameters was evaluated by using empirical semivariograms with adjusted theoretical mathematical model of variograms. Raster maps of the studied properties were drawn. The concentration of chemical properties (TN, TOC, pHKCl) and the activity of UR and ADA was significantly higher in Phaeozem compared to Luvisol. Only the nitrate reductase activity was similar in samples of both types of soils. To characterise the spatial variability of the properties studied, spherical or mixed (spherical/linear) models with or without the nugget effect (only NR activity in Luvisol), were fitted to the calculated semivariograms. Total N content, NR activity in Phaeozem and ADA activity in Luvisol were in the strong variability class (the nugget effect < 25 %), while UR activity in both soil types and ADA activity in Phaeozem were situated in the moderate variability class (the nugget effect between 25 and 75 %). The ranges of influence calculated for properties studied ranged from 9.0 to 17 m. The raster maps showed that the distribution of each variable had a different pattern on the area studied. A specific variable was distributed in both topsoils in a different way.

PL

Celem badań było określenie zmienności przestrzennej zawartości N-ogółem (TN) oraz aktywności ureazy (UR), nitroreduktazy (NR) i poziomu deaminacji argininy (ADA) w poziomie powierzchniowym gleby płowej oraz czarnej ziemi regionu Pomorza i Kujaw. W kwietniu 2007 r. z obu obszarów pobrano po 50 próbek glebowych z punktów zlokalizowanych w sztywnej siatce kwadratów (90 × 40 m). Wyniki zmienności przestrzennej badanych parametrów określono za pomocą empirycznych variogramów oraz map rastrowych. Zawartość parametrów chemicznych (TN, TOC, pHKCl) oraz aktywność UR i ADA były większe w czarnej ziemi w porównaniu do gleby płowej. Jedynie aktywność nitroreduktazy była zbliżona w obu typach badanych gleb. Zmienność przestrzenną badanych parametrów przedstawiono za pomocą sferycznych lub mieszanych (sferyczno-liniowych) modeli semivariogamów. Zawartość N ogółem, aktywność NR w czarnej ziemi oraz ADA w glebie płowej znajdowały się w niskiej klasie zmienności (wariancja samorodka < 25 %) natomiast aktywność UR w obu typach gleb oraz ADA w czarnej ziemi zaliczono do średniej klasy zmienności. Zakresy autokorelacji badanych zmiennych wynosiły od 9 do 17 m. Mapy przestrzennego rozmieszczenia wyników badanych zmiennych wykazały, że rozmieszczenie wartości każdej z nich wykazywało inny kierunek. Ponadto wartości danej cechy były odmiennie rozmieszczone w obu typach gleb.

Słowa kluczowe

EN

Luvisol; Phaeozem; spatial variability; total N; urease; nitrate reductase; arginine deaminase; activity

PL

gleba płowa; czarna ziemia; zmienność przestrzenna; N-ogółem; ureaza; nitroreduktaza; poziom deaminacji argininy

• Wydawca: Towarzystwo Chemii i Inżynierii Ekologicznej
• Czasopismo: Ecological Chemistry and Engineering. A
• Rocznik: 2013
• Tom: Vol. 20, nr 6
• Strony: 663--674
• Opis fizyczny: Bibliogr. 35 poz., tab., wykr., rys.

Twórcy

autor

Piotrowska-Długosz A.

• Division of Biochemistry, Faculty of Agriculture and Biotechnology, University of Technology and Life Sciences, ul. Bernardyńska 6, 85–029 Bydgoszcz, Poland

autor

Rybacki M.

• Division of Biochemistry, Faculty of Agriculture and Biotechnology, University of Technology and Life Sciences, ul. Bernardyńska 6, 85–029 Bydgoszcz, Poland

autor

Długosz J.

• Department of Soil Science and Soil Protection, Faculty of Agriculture and Biotechnology, University of Technology and Life Sciences, Bernardyńska 6, 85–029 Bydgoszcz, Poland.

autor

Kobierski M.

• Department of Soil Science and Soil Protection, Faculty of Agriculture and Biotechnology, University of Technology and Life Sciences, Bernardyńska 6, 85–029 Bydgoszcz, Poland.

autor

Wilczewski E.

• Department of Agrotechnology, Faculty of Agriculture and Biotechnology, University of Technology and Life Sciences, ul. Kordeckiego 20, 85–225 Bydgoszcz, Poland.

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